SLING-2788 - move bridge module from whiteboard to extensions

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1611616 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..33f1002
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,116 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.apache.sling</groupId>
+        <artifactId>sling</artifactId>
+        <version>19</version>
+        <relativePath>../../../../parent/pom.xml</relativePath>
+    </parent>
+
+    <groupId>org.apache.sling</groupId>
+    <artifactId>org.apache.sling.hc.junit.bridge</artifactId>
+    <packaging>bundle</packaging>
+    <version>0.9.9-SNAPSHOT</version>
+
+    <name>Apache Sling Health Check JUnit Bridge</name>
+    <inceptionYear>2013</inceptionYear>
+    
+    <description>
+        Makes Sling Health Checks available as server-side JUnit tests, to
+        allow them to be used as part of integration tests.
+    </description>
+
+    <properties>
+        <sling.java.version>6</sling.java.version>
+    </properties>
+
+    <scm>
+        <connection>scm:svn:http://svn.apache.org/repos/asf/sling/trunk/bundles/extensions/healthcheck/junit-bridge</connection>
+        <developerConnection>scm:svn:https://svn.apache.org/repos/asf/sling/trunk/bundles/extensions/healthcheck/junit-bridge</developerConnection>
+        <url>http://svn.apache.org/viewvc/sling/trunk/bundles/extensions/healthcheck/junit-bridge</url>
+    </scm>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-scr-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-bundle-plugin</artifactId>
+                <extensions>true</extensions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.compendium</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.felix</groupId>
+            <artifactId>org.apache.felix.scr.annotations</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.6.2</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>1.9.5</version>
+            <scope>test</scope>
+        </dependency>
+		<dependency>
+		    <groupId>commons-lang</groupId>
+		    <artifactId>commons-lang</artifactId>
+		    <version>2.5</version>
+		    <scope>test</scope>
+		</dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.6.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.commons.osgi</artifactId>
+            <version>2.2.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.hc.core</artifactId>
+            <version>1.1.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.junit.core</artifactId>
+            <version>1.0.6</version>
+            <scope>provided</scope>
+        </dependency>
+     </dependencies>
+</project>
diff --git a/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTest.java b/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTest.java
new file mode 100644
index 0000000..73f3d72
--- /dev/null
+++ b/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTest.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The SF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package org.apache.sling.hc.junitbridge;
+
+import junit.framework.TestCase;
+
+import org.apache.sling.hc.api.HealthCheck;
+import org.apache.sling.hc.api.Result;
+import org.apache.sling.hc.api.ResultLog;
+import org.apache.sling.hc.util.HealthCheckMetadata;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
+
+public class HealthCheckTest extends TestCase {
+    private final HealthCheck hc;
+    private final HealthCheckMetadata metadata;
+    private final BundleContext bundleContext;
+    private final ServiceReference serviceRef;
+        
+    HealthCheckTest(TestBridgeContext context, ServiceReference ref) {
+        super("testHealthCheck");
+        bundleContext = context.getBundleContext();
+        serviceRef = ref;
+        this.hc = (HealthCheck)bundleContext.getService(ref);
+        this.metadata = new HealthCheckMetadata(ref);
+    }
+    
+    @Override
+    public String getName() {
+        return metadata.getName();
+    }
+
+    /** Execute our health check and dump its log
+     *  messages > INFO if it fails */
+    public void testHealthCheck() {
+        try {
+            final Result r = hc.execute();
+            final StringBuilder failMsg = new StringBuilder();
+            if(!r.isOk()) {
+                failMsg.append(metadata.getName());
+                failMsg.append("\n");
+                for(ResultLog.Entry log : r) {
+                    if(log.getStatus().compareTo(Result.Status.INFO) > 0) {
+                        if(failMsg.length() > 0) {
+                            failMsg.append("\n");
+                        }
+                        failMsg.append(log.getStatus().toString());
+                        failMsg.append(" - ");
+                        failMsg.append(log.getMessage());
+                    }
+                }
+            }
+            if(failMsg.length() > 0) {
+                fail("Health Check failed: " + failMsg.toString());
+            }
+        } finally {
+            // TODO is that ok? service not used anymore after this?
+            bundleContext.ungetService(serviceRef);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTestsProvider.java b/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTestsProvider.java
new file mode 100644
index 0000000..7008aa2
--- /dev/null
+++ b/src/main/java/org/apache/sling/hc/junitbridge/HealthCheckTestsProvider.java
@@ -0,0 +1,118 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The SF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package org.apache.sling.hc.junitbridge;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Property;
+import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.commons.osgi.PropertiesUtil;
+import org.apache.sling.junit.TestsProvider;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+import org.osgi.service.component.ComponentContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/** Bridge Health Checks into the Sling JUnit server-side test
+ *  framework, based on their tags.
+ */
+@Component(metatype=true)
+@Service
+public class HealthCheckTestsProvider implements TestsProvider {
+
+    private String servicePid;
+    private long lastModified;
+    private BundleContext bundleContext;
+    
+    private final Logger log = LoggerFactory.getLogger(getClass());
+    
+    public static final String TEST_NAME_PREFIX = "HealthChecks(";
+    public static final String TEST_NAME_SUFFIX = ")";
+
+    @Property(cardinality=2147483647, 
+            label="Health Check Tags",
+            description="Groups of health check tags to execute as JUnit tests. Use the standard Health Checks 'includeThis,-omitThat' syntax")
+    public static final String PROP_TAG_GROUPS = "health.check.tag.groups";
+    
+    private String [] tagGroups;
+    
+    @Activate
+    protected void activate(ComponentContext ctx) {
+        bundleContext = ctx.getBundleContext();
+        tagGroups = PropertiesUtil.toStringArray(ctx.getProperties().get(PROP_TAG_GROUPS));
+        if(tagGroups == null) {
+            tagGroups = new String[]{};
+            log.warn("No tag groups configured via {}, Health Checks won't be available as JUnit tests", PROP_TAG_GROUPS);
+        }
+        servicePid = (String)ctx.getProperties().get(Constants.SERVICE_PID);
+        lastModified = System.currentTimeMillis();
+    }
+    
+    @Deactivate
+    protected void deactivate() {
+        bundleContext = null;
+        servicePid = null;
+        lastModified = -1;
+    }
+    
+    @Override
+    public Class<?> createTestClass(String testName) throws ClassNotFoundException {
+        // The test name is like "Health Checks(foo,bar)" and we need just 'foo,bar'
+        String tagString = null;
+        try {
+            tagString = testName.substring(0, testName.length() - TEST_NAME_SUFFIX.length()).substring(TEST_NAME_PREFIX.length()); 
+        } catch(Exception e) {
+            throw new RuntimeException("Invalid test name:" + testName);
+        }
+         
+        JUnitTestBridge.setThreadContext(new TestBridgeContext(bundleContext, splitTags(tagString)));
+        return JUnitTestBridge.class;
+    }
+    
+    private String [] splitTags(String tags) {
+        final List<String> result = new ArrayList<String>();
+        for(String tag: tags.split(",")) {
+            result.add(tag.trim());
+        }
+        return result.toArray(new String[]{});
+    }
+
+    @Override
+    public String getServicePid() {
+        return servicePid;
+    }
+
+    @Override
+    public List<String> getTestNames() {
+        final List<String> result = new ArrayList<String>();
+        for(String t : tagGroups) {
+            result.add(TEST_NAME_PREFIX + t + TEST_NAME_SUFFIX);
+        }
+        return result;
+    }
+
+    @Override
+    public long lastModified() {
+        return lastModified;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/hc/junitbridge/JUnitTestBridge.java b/src/main/java/org/apache/sling/hc/junitbridge/JUnitTestBridge.java
new file mode 100644
index 0000000..c611c40
--- /dev/null
+++ b/src/main/java/org/apache/sling/hc/junitbridge/JUnitTestBridge.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The SF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package org.apache.sling.hc.junitbridge;
+
+import static org.junit.Assert.assertNotNull;
+import junit.framework.TestSuite;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.AllTests;
+import org.osgi.framework.ServiceReference;
+
+@RunWith(AllTests.class)
+public class JUnitTestBridge {
+    private static ThreadLocal<TestBridgeContext> testContext = new ThreadLocal<TestBridgeContext>();
+    
+    static void setThreadContext(TestBridgeContext c) {
+        testContext.set(c);
+    }
+    
+    public static junit.framework.Test suite() {
+        final TestBridgeContext context = testContext.get();
+        assertNotNull("Expecting non-null TestBridgeContext, via ThreadLocal", context);
+        TestSuite suite = new TestSuite();
+        for(ServiceReference ref : context.getFilter().getTaggedHealthCheckServiceReferences(context.getTags())) {
+            suite.addTest(new HealthCheckTest(context, ref));
+        }
+        return suite;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/hc/junitbridge/TestBridgeContext.java b/src/main/java/org/apache/sling/hc/junitbridge/TestBridgeContext.java
new file mode 100644
index 0000000..030dfe5
--- /dev/null
+++ b/src/main/java/org/apache/sling/hc/junitbridge/TestBridgeContext.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The SF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package org.apache.sling.hc.junitbridge;
+
+import org.apache.sling.hc.util.HealthCheckFilter;
+import org.osgi.framework.BundleContext;
+
+class TestBridgeContext {
+    private final String [] tags;
+    private final HealthCheckFilter filter;
+    private final BundleContext bundleContext;
+        
+    TestBridgeContext(BundleContext bundleContext, String [] tags) {
+        this.bundleContext = bundleContext;
+        this.tags = tags;
+        this.filter = new HealthCheckFilter(bundleContext);
+    }
+    
+    String [] getTags() {
+        return tags;
+    }
+    
+    HealthCheckFilter getFilter() {
+        return filter;
+    }
+    
+    BundleContext getBundleContext() {
+        return bundleContext;
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/org/apache/sling/hc/junitbridge/tests/HealthCheckTestsProviderTest.java b/src/test/java/org/apache/sling/hc/junitbridge/tests/HealthCheckTestsProviderTest.java
new file mode 100644
index 0000000..4931534
--- /dev/null
+++ b/src/test/java/org/apache/sling/hc/junitbridge/tests/HealthCheckTestsProviderTest.java
@@ -0,0 +1,198 @@
+package org.apache.sling.hc.junitbridge.tests;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.Dictionary;
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+
+import org.apache.sling.hc.api.HealthCheck;
+import org.apache.sling.hc.api.Result;
+import org.apache.sling.hc.junitbridge.HealthCheckTestsProvider;
+import org.apache.sling.hc.util.FormattingResultLog;
+import org.apache.sling.junit.TestsProvider;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.JUnitCore;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.service.component.ComponentContext;
+
+/** Test the HealthCheckTestsProvider, which 
+ *  uses everything else.
+ */
+public class HealthCheckTestsProviderTest {
+    private TestsProvider provider;
+    private long setupTimestamp;
+    private final Random random = new Random();
+    
+    static abstract class HcLogSetter {
+        abstract FormattingResultLog setLog(FormattingResultLog log);
+    };
+    
+    private static final Map<String, HcLogSetter> LOG_SETTERS = new HashMap<String, HcLogSetter>(); 
+    
+    static {
+        LOG_SETTERS.put("PASS_HC", new HcLogSetter() {
+            @Override
+            FormattingResultLog setLog(FormattingResultLog log) {
+                log.info("pass");
+                return log;
+            }
+        });
+        LOG_SETTERS.put("OK_HC", new HcLogSetter() {
+            @Override
+            FormattingResultLog setLog(FormattingResultLog log) {
+                log.debug("ok");
+                return log;
+            }
+        });
+        LOG_SETTERS.put("FAIL_HC", new HcLogSetter() {
+            @Override
+            FormattingResultLog setLog(FormattingResultLog log) {
+                log.warn("fail");
+                return log;
+            }
+        });
+        LOG_SETTERS.put("BAD_HC", new HcLogSetter() {
+            @Override
+            FormattingResultLog setLog(FormattingResultLog log) {
+                log.warn("bad");
+                return log;
+            }
+        });
+    }
+    
+    // Our fake tags represent a number of
+    // passing (P) or failing (F) fake HCs 
+    final String [] TAG_GROUPS = {
+            "a,b",
+            "some,tags",
+            "justOne"
+    };
+    
+    private static String testName(String tagGroup) {
+        return HealthCheckTestsProvider.TEST_NAME_PREFIX + tagGroup + HealthCheckTestsProvider.TEST_NAME_SUFFIX;
+    }
+    
+    /** Return ServiceReferences that point to our test HealthChecks */
+    private ServiceReference [] getMockReferences(BundleContext bc, String OSGiFilter) {
+        
+        final List<ServiceReference> refs = new ArrayList<ServiceReference>();
+        
+        for(String key : LOG_SETTERS.keySet()) {
+            if(OSGiFilter.contains(key)) {
+                final HcLogSetter hls = LOG_SETTERS.get(key);
+                final ServiceReference ref = Mockito.mock(ServiceReference.class);
+                Mockito.when(ref.getProperty(Constants.SERVICE_ID)).thenReturn(random.nextLong());
+                Mockito.when(ref.getProperty(HealthCheck.NAME)).thenReturn("someTest");
+                final HealthCheck hc = new HealthCheck() {
+                    @Override
+                    public Result execute() {
+                        final FormattingResultLog log = new FormattingResultLog();
+                        return new Result(hls.setLog(log));
+                    }
+                };
+                Mockito.when(bc.getService(ref)).thenReturn(hc);
+                
+                refs.add(ref);
+            }
+        }
+        
+        return refs.toArray(new ServiceReference[]{});
+    }
+            
+    @Before
+    public void setup() throws InvalidSyntaxException {
+        setupTimestamp = System.currentTimeMillis();
+        final ComponentContext ctx = Mockito.mock(ComponentContext.class);
+
+        // context properties
+        final Dictionary<String, Object> props = new Hashtable<String, Object>();
+        props.put(HealthCheckTestsProvider.PROP_TAG_GROUPS, TAG_GROUPS);
+        props.put(Constants.SERVICE_PID, getClass().getName());
+        Mockito.when(ctx.getProperties()).thenReturn(props);
+        
+        // bundle context
+        final BundleContext bc = Mockito.mock(BundleContext.class);
+        Mockito.when(ctx.getBundleContext()).thenReturn(bc);
+        
+        // HealthCheck ServiceReferences mocks
+        Mockito.when(bc.getServiceReferences(Mockito.anyString(), Mockito.anyString())).thenAnswer(
+            new Answer<ServiceReference[]> () {
+                @Override
+                public ServiceReference[] answer(InvocationOnMock invocation) throws Throwable {
+                    return getMockReferences(bc, (String)invocation.getArguments()[1]);
+                }
+            });
+        
+        provider = new HealthCheckTestsProvider() {
+            {
+                activate(ctx);
+            }
+        };
+    }
+    
+    @Test
+    public void testGetTestNames() {
+        final List<String> names = provider.getTestNames();
+        assertEquals(TAG_GROUPS.length, names.size());
+        for(String tag : TAG_GROUPS) {
+            final String expected = testName(tag);
+            assertTrue("Expecting test names to contain " + expected + ", " + names, names.contains(expected));
+        }
+    }
+    
+    @Test
+    public void testServicePid() {
+        assertEquals(getClass().getName(), provider.getServicePid());
+    }
+    
+    @Test
+    public void testLastModified() {
+        assertTrue(provider.lastModified() >= setupTimestamp);
+    }
+    
+    @Test
+    public void testNoFailuresHealthCheck() throws ClassNotFoundException {
+        final Class<?> c = provider.createTestClass(testName("PASS_HC"));
+        assertNotNull("Expecting non-null test class", c);
+        final org.junit.runner.Result r = JUnitCore.runClasses(c); 
+        assertEquals(0, r.getFailureCount());
+        assertEquals(1, r.getRunCount());
+    }
+    
+    @Test
+    public void testFailingHealthCheck() throws ClassNotFoundException {
+        final Class<?> c = provider.createTestClass(testName("FAIL_HC and BAD_HC"));
+        assertNotNull("Expecting non-null test class", c);
+        final org.junit.runner.Result r = JUnitCore.runClasses(c); 
+        assertEquals(2, r.getFailureCount());
+        assertEquals(2, r.getRunCount());
+    }
+    
+    @Test
+    public void testPassAndFailHealthCheck() throws ClassNotFoundException {
+        final Class<?> c = provider.createTestClass(testName("FAIL_HC and PASS_HC and OK_HC and BAD_HC"));
+        assertNotNull("Expecting non-null test class", c);
+        final org.junit.runner.Result r = JUnitCore.runClasses(c); 
+        assertEquals(2, r.getFailureCount());
+        assertEquals(4, r.getRunCount());
+    }
+
+    @Test(expected=RuntimeException.class)
+    public void testInvalidTestName() throws ClassNotFoundException {
+        provider.createTestClass("foo");
+    }
+}
\ No newline at end of file